CVE-2021-40154

MEDIUM
Published Dec 1, 20214y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Dec 1, 2021 4y ago
Last Modified Jun 17, 2026 2w ago

Description

NXP LPC55S69 devices before A3 have a buffer over-read via a crafted wlength value in a GET Descriptor Configuration request during use of USB In-System Programming (ISP) mode. This discloses protected flash memory.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-125 Out-of-bounds Read Memory Safety

Affected Products 12

VendorProductVersionRange
nxplpc55s69jbd100_firmware*any
nxplpc55s69jbd1000aany
nxplpc55s69jbd100_firmware*any
nxplpc55s69jbd1001bany
nxplpc55s69jbd64_firmware*any
nxplpc55s69jbd640aany
nxplpc55s69jbd64_firmware*any
nxplpc55s69jbd641bany
nxplpc55s69jev98_firmware*any
nxplpc55s69jev980aany
nxplpc55s69jev98_firmware*any
nxplpc55s69jev981bany

References 2

  • github.com https://github.com/Xen1thLabs-AE/CVE-2021-40154
    Third Party Advisory
  • darkmatter.ae https://www.darkmatter.ae/xen1thlabs/published-advisories/
    Broken LinkThird Party Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.